ZOB Glass have been producing scientific tubes and smoke ware in Southern California since 2004. ZOB Glass specializes in high grade scientific glass with an eye for detail and innovation. ZOB has gained a following by creating some of the best percolator systems on the market all while keeping their prices at an affordable level. All of their products are made in the USA from high quality glass that is either sourced from Europe or directly in the USA. Beefy’s Bongs are an authorized dealer of ZOB Glass.